Adding Send to Gaia ID feature

components/gcm_driver/gcm_driver_desktop.cc

Index: components/gcm_driver/gcm_driver_desktop.cc
diff --git a/components/gcm_driver/gcm_driver_desktop.cc b/components/gcm_driver/gcm_driver_desktop.cc
index 6a9153986819f84471c5c6d49f7df3d8c5201986..e6d04f54db7fe172f7f8132a4f580316e999b37d 100644
--- a/components/gcm_driver/gcm_driver_desktop.cc
+++ b/components/gcm_driver/gcm_driver_desktop.cc
@@ -797,7 +797,9 @@ void GCMDriverDesktop::GCMClientReady(
   last_token_fetch_time_ = last_token_fetch_time;
 
   GCMDriver::AddAppHandler(kGCMAccountMapperAppId, account_mapper_.get());
-  account_mapper_->Initialize(account_mappings);
+  account_mapper_->Initialize(account_mappings,
+                              base::Bind(&GCMDriverDesktop::MessageReceived,
+                                         weak_ptr_factory_.GetWeakPtr()));
 
   delayed_task_controller_->SetReady();
 }